nixos-config/nixos/system/desktop/home-manager/doom-emacs.nix

{ config, pkgs, lib, ... }: {
  home-manager.users.mainUser = {
    programs.doom-emacs = {
      enable = lib.mkDefault true;
      doomPrivateDir = ./doom.d;
      extraConfig = ''
        ;; "monospace" means use the system default. However, the default is usually two
        ;; points larger than I'd like, so I specify size 12 here.
        (setq doom-font
          (font-spec :family "Jetbrains Mono" :size ${toString config.programs.custom.urxvt.fontSize} :weight 'light))
        ;(setq doom-font
        ;  (font-spec :family "Terminus" :size ${toString config.programs.custom.urxvt.fontSize} :weight 'light))
      '';

      emacsPackagesOverlay = self: super: {
        # fixes https://github.com/vlaci/nix-doom-emacs/issues/394
        gitignore-mode = pkgs.emacsPackages.git-modes;
        gitconfig-mode = pkgs.emacsPackages.git-modes;
      };
    };
  };
  environment.systemPackages = [
    pkgs.ripgrep
  ];
}